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package erratic
import (
"context"
"testing"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
)
func TestErraticDrop(t *testing.T) {
e := &Erratic{drop: 2} // 50% drops
tests := []struct {
rrtype uint16
expectedCode int
expectedErr error
drop bool
}{
{rrtype: dns.TypeA, expectedCode: dns.RcodeSuccess, expectedErr: nil, drop: true},
{rrtype: dns.TypeA, expectedCode: dns.RcodeSuccess, expectedErr: nil, drop: false},
{rrtype: dns.TypeAAAA, expectedCode: dns.RcodeSuccess, expectedErr: nil, drop: true},
{rrtype: dns.TypeHINFO, expectedCode: dns.RcodeServerFailure, expectedErr: nil, drop: false},
}
ctx := context.TODO()
for i, tc := range tests {
req := new(dns.Msg)
req.SetQuestion("example.org.", tc.rrtype)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
code, err := e.ServeDNS(ctx, rec, req)
if err != tc.expectedErr {
t.Errorf("Test %d: Expected error %q, but got %q", i, tc.expectedErr, err)
}
if code != int(tc.expectedCode) {
t.Errorf("Test %d: Expected status code %d, but got %d", i, tc.expectedCode, code)
}
if tc.drop && rec.Msg != nil {
t.Errorf("Test %d: Expected dropped message, but got %q", i, rec.Msg.Question[0].Name)
}
}
}
func TestErraticTruncate(t *testing.T) {
e := &Erratic{truncate: 2} // 50% drops
tests := []struct {
expectedCode int
expectedErr error
truncate bool
}{
{expectedCode: dns.RcodeSuccess, expectedErr: nil, truncate: true},
{expectedCode: dns.RcodeSuccess, expectedErr: nil, truncate: false},
}
ctx := context.TODO()
for i, tc := range tests {
req := new(dns.Msg)
req.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
code, err := e.ServeDNS(ctx, rec, req)
if err != tc.expectedErr {
t.Errorf("Test %d: Expected error %q, but got %q", i, tc.expectedErr, err)
}
if code != int(tc.expectedCode) {
t.Errorf("Test %d: Expected status code %d, but got %d", i, tc.expectedCode, code)
}
if tc.truncate && !rec.Msg.Truncated {
t.Errorf("Test %d: Expected truncated message, but got %q", i, rec.Msg.Question[0].Name)
}
}
}
func TestAxfr(t *testing.T) {
e := &Erratic{truncate: 0} // nothing, just check if we can get an axfr
ctx := context.TODO()
req := new(dns.Msg)
req.SetQuestion("example.org.", dns.TypeAXFR)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
_, err := e.ServeDNS(ctx, rec, req)
if err != nil {
t.Errorf("Failed to set up AXFR: %s", err)
}
if x := rec.Msg.Answer[0].Header().Rrtype; x != dns.TypeSOA {
t.Errorf("Expected for record to be %d, got %d", dns.TypeSOA, x)
}
}
func TestErratic(t *testing.T) {
e := &Erratic{drop: 0, delay: 0}
ctx := context.TODO()
req := new(dns.Msg)
req.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
e.ServeDNS(ctx, rec, req)
if rec.Msg.Answer[0].Header().Rrtype != dns.TypeA {
t.Errorf("Expected A response, got %d type", rec.Msg.Answer[0].Header().Rrtype)
}
}
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